Turkish Police, Protesters Clash After Teen's Death

Teenager Was Hit by Police Tear-Gas Capsule During June Protests

ISTANBUL—Police and protesters clashed Tuesday in several of Turkey's biggest cities, and thousands more took to streets across the country, following the death of a teenager who had been hit by a police tear-gas canister during antigovernment protests last year.

The protests, which police sought to disperse with tear gas and water cannons in Istanbul, Ankara and other cities, marked some of the broadest-based unrest since demonstrations against the rule of Prime Minister Recep Tayyip Erdogan swept the country more than...